i've spent about two hours on google trying to find dynos on this BUT, none seem to be had

anyway, my question is with a a 50 trim t3/t4 like the garrett with a stage 3 wheel or precision 5031 or 5431 what kind of pressure is needed to arrive in that 280whp to 300whp range.

easy as **** to find answers for an LS or gsr but the 11:1 of the jdm itr there isn't jack on the net.

reason i ask?

1. wastegate spring
2. map sensor if it needs to be upgraded

 

I'd take whatever the average it takes a GSR to get it and take about 2 PSI off of there and you should be close.

 

that's my best wild *** guess as well. that of course means 8-9lbs which would be a .6bar spring

hope someone has actual data, it has to exist somewhere

 

imo you should just upgrade your map sensor to begin with. theyre pretty cheap!

Id say a good 9-10lbs through that turbo should get you there.

On my ported and polished gsr on a 3255 I made 293 on 8lbs. of course there are many other factors and thats at 10:1

 

If I'm not mistaken a GT28RS is somewhat comparable to what you are looking for. If so I remember a dyno on evans tuning site of a Mini with an ITR swap doing 295 at 10 PSI with one.

I'd say 8-10 PSI also should land you around where you want. If you want to be cautious with power for some reason go with 8, otherwise I'd just run 10.

 

that's a good point on the map

as for the other factors

inline pro ss and a full 2.5" exhaust, may run a 3" dp depending on clearance with the rad fans

 

Got my gm 3 bar for $30. thats like staying and eating in 3 times every paycheck instead of going to applebees LOL

 

where at? i think i still have an OEM map from a 1991 corvette in the shop, are those things actually compatible?

 

LOL nothing is NOT compatible. It just looses cost/value.

 

i have a gsr with itr pistons and rods and stock b16 head ...cp ~11.0:1
and made 297whp / 220 ftlbs on 10.5psi with a godspeed .50 trim .57a/r hotside
...loaded dyno ..was told it reads a little bit lower than a mustang dyno

 

Mustang Dynos are load-bearing dynamometers.